Feeds

Sony to offer patch for 'rootkit' DRM

Fix removes cloaking, but not the 'rootkit'

Securing Web Applications Made Simple and Scalable

Updated Sony BMG said today it will offer a patch for one of its own exploits - one that comes bundled with its music CDs.

The code cloaks itself and by intercepting and redirecting low level windows system calls, forces the audio through a custom player, and restricts the number of CD burns that can be made.

As Sys Internals' Mark Russinovich discovered this week, removing the Sony code using standard anti-malware tools leaves the user with an inoperable CD drive.

Russinovich also pointed out that because the cloaking technique it used to hide itself was so crude, malware authors could hide their own nefarious programs on users hard disks using Sony's DRM software.

However, the patch that Sony will offer doesn't remove the 'rootkit' DRM: it only makes the hidden files visible.

Macintosh and Linux users are unaffected by the DRM kit, which only works on Windows PCs.

It isn't quite the "bombs" the RIAA once suggested it was developing to deter music downloads, but it's in the same spirit.

And here's the patch from First 4 Internet Ltd, the British company that developed the DRM software .

"This Service Pack removes the cloaking technology component that has been recently discussed in a number of articles published regarding the XCP Technology used on SONY BMG content protected CDs." [our emphasis]

The note continues: "This component is not malicious and does not compromise security. However to alleviate any concerns that users may have about the program posing potential security vulnerabilities, this update has been released to enable users to remove this component from their computers."

But wait! Don't do that just yet...

Anti-malware company F-Secure discusses the Sony DRM software here. F-Secure says its rootkit detection software will spot the hidden files, but strongly advises users not to remove it using its Blacklight software, and instead advises users to contact Sony.

"If you find this rootkit from your system, we recommend you don't remove it with our products. As this DRM system is implemented as a filter driver for the CD drive, just blindly removing it might result in an inaccessible CD drive letter," advises F-Secure.

It is alarming how little outrage there is from ordinary PC users. While Register readers are well versed in the restrictions of DRM and the dangers of malware, there's little sign the public shares this knowledge.

Incredibly, the Sony DRM malware has been out on the market for eight months and is bundled on 20 CD titles. Sony said it hadn't received a single complaint until this week. So, disturbingly, most people either haven't run into serious problems yet, or even more disturbingly, don't find the Sony DRM particularly onerous. We pray it's not the latter.

However, Sony's decision to offer a 'patch' that fails to remove the DRM code suggests it isn't too concerned by the howls of outrage heard this week from sophisticated PC users.

And with this level of apathy, the music giants will be emboldened to try these techniques again. And again. And again. ®

The smart choice: opportunity from uncertainty

More from The Register

next story
Mozilla fixes CRITICAL security holes in Firefox, urges v31 upgrade
Misc memory hazards 'could be exploited' - and guess what, one's a Javascript vuln
Manic malware Mayhem spreads through Linux, FreeBSD web servers
And how Google could cripple infection rate in a second
How long is too long to wait for a security fix?
Synology finally patches OpenSSL bugs in Trevor's NAS
Don't look, Snowden: Security biz chases Tails with zero-day flaws alert
Exodus vows not to sell secrets of whistleblower's favorite OS
Roll out the welcome mat to hackers and crackers
Security chap pens guide to bug bounty programs that won't fail like Yahoo!'s
HIDDEN packet sniffer spy tech in MILLIONS of iPhones, iPads – expert
Don't panic though – Apple's backdoor is not wide open to all, guru tells us
Researcher sat on critical IE bugs for THREE YEARS
VUPEN waited for Pwn2Own cash while IE's sandbox leaked
prev story

Whitepapers

Top three mobile application threats
Prevent sensitive data leakage over insecure channels or stolen mobile devices.
Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
Boost IT visibility and business value
How building a great service catalog relieves pressure points and demonstrates the value of IT service management.
Designing a Defense for Mobile Applications
Learn about the various considerations for defending mobile applications - from the application architecture itself to the myriad testing technologies.
Build a business case: developing custom apps
Learn how to maximize the value of custom applications by accelerating and simplifying their development.